Daily Practice

Higher Plus

3rd August 1983

5 questions · 15 marks · Grades 8-9 · 51 question types in this band

1
Conditional Probability3 marks
A bag holds 5 red, 6 blue and 2 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
2
Histograms3 marks
On a histogram the bar for 30 < x <= 50 has a frequency density of 1.5. How many values are in that class?
3
Bounds3 marks
A rectangle is 7 cm by 14 cm, each correct to the nearest cm. Work out the upper bound of its area.
4
Transforming Graphs y=f(x)3 marks
The point (4, 2) lies on y = f(x). Write down its image on y = f(x) + 1.
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 48. Work out y when x = 4.

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